How to Use Solenoid Valve​​​ 1/2" N/C AC 220V (Male thread): Examples, Pinouts, and Specs

The Solenoid Valve 1/2" N/C AC 220V is an electromechanical valve designed to control the flow of fluids in a system. This specific model is a normally closed (N/C) valve, meaning it remains closed when no electrical current is applied and opens when powered. It operates on 220V AC and features a 1/2-inch male threaded connection for straightforward integration into pipelines.

• Irrigation systems: Automated water flow control for gardens and farms.
• Industrial fluid control: Managing the flow of liquids in manufacturing processes.
• HVAC systems: Regulating water or refrigerant flow in heating and cooling systems.
• Home appliances: Used in washing machines, dishwashers, and water purifiers.

The solenoid valve does not have traditional pins like an IC but instead has two electrical terminals for AC power input. Below is a description of the connections:

Note: Ensure proper insulation and secure connections to avoid electrical hazards.

1. Prepare the Power Supply: Ensure you have a stable 220V AC power source. Use a switch or relay to control the power supply to the valve.
2. Connect the Terminals:
   • Connect the Live (L) wire to one terminal of the solenoid valve.
   • Connect the Neutral (N) wire to the other terminal.
3. Install the Valve:
   • Screw the valve into the pipeline using the 1/2-inch male thread. Use Teflon tape to ensure a watertight seal.
   • Ensure the arrow on the valve body aligns with the direction of fluid flow.
4. Test the Valve:
   • Power the valve to confirm it opens and closes as expected.
   • Check for leaks and ensure proper operation.

• Voltage Compatibility: Only use the valve with a 220V AC power supply. Using incorrect voltage can damage the valve.
• Fluid Compatibility: This valve is designed for water and low-viscosity fluids. Avoid using it with corrosive or high-viscosity liquids.
• Pressure Range: Ensure the operating pressure is within the specified range (0.02 MPa to 0.8 MPa).
• Safety Precautions: Always disconnect the power supply before installing or servicing the valve.
• Relay Control: If integrating with a microcontroller like an Arduino, use a relay module to safely control the 220V AC power.

To control the solenoid valve using an Arduino UNO, you can use a relay module to switch the 220V AC power. Below is an example code snippet:

// Example code to control a solenoid valve using Arduino and a relay module

const int relayPin = 7; // Pin connected to the relay module

void setup() {
  pinMode(relayPin, OUTPUT); // Set the relay pin as an output
  digitalWrite(relayPin, LOW); // Ensure the relay is off initially
}

void loop() {
  digitalWrite(relayPin, HIGH); // Turn on the relay (valve opens)
  delay(5000); // Keep the valve open for 5 seconds
  digitalWrite(relayPin, LOW); // Turn off the relay (valve closes)
  delay(5000); // Wait for 5 seconds before repeating
}

Note: Ensure proper isolation between the Arduino and the high-voltage AC circuit. Use an optocoupler-based relay module for safety.

1. Can this valve be used with DC power? No, this valve is designed specifically for 220V AC operation.

2. What happens if the power supply is interrupted? Since this is a normally closed (N/C) valve, it will automatically close when power is lost.

3. Can this valve handle hot water? Yes, it can handle fluids up to 80°C, making it suitable for hot water applications.

4. How do I know the flow direction? The valve body has an arrow indicating the correct flow direction.

By following this documentation, you can effectively integrate and troubleshoot the Solenoid Valve 1/2" N/C AC 220V in your projects.